7 documents found, page 1 of 1
Magnetic properties of acicular ultrafine iron particles
Varanda, Laudemir Carlos [UNESP]; Goya, Gerardo Fabian; Morales, M. Puerto; Marques, Rodrigo Fernando Costa; Godoi, Ricardo Henrique MoretonMade available in DSpace on 2022-04-28T18:54:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-12-01; The magnetic properties of acicular ultrafine iron particles are studied. The introduction of high recording densities on recording media has meant a dramatic bit size reduction and track density increase on the media surface. Transmission electron spectroscopy (TEM), x-ray diffraction (XRD), magnetizat...
The Amazon Tall Tower Observatory (ATTO): Overview of pilot measurements on eco...
Andreae, Meinrat O.; Acevedo, Otávio C.; Araüjo, Alessandro Carioca de; Artaxo, Paulo; Barbosa, Cybelli G.G.; Barbosa, H. M. J.; Brito, Joel F.The Amazon Basin plays key roles in the carbon and water cycles, climate change, atmospheric chemistry, and biodiversity. It has already been changed significantly by human activities, and more pervasive change is expected to occur in the coming decades. It is therefore essential to establish long-term measurement sites that provide a baseline record of present-day climatic, biogeochemical, and atmospheric cond...
Molecular composition of organic aerosols in central Amazonia: An ultra-high-re...
Kourtchev, Ivan N.; Godoi, Ricardo Henrique Moreton; Connors, Sarah; Levine, James G.; Archibald, Alexander Thomas; Godoi, Ana Flávia LocateliThe Amazon Basin plays key role in atmospheric chemistry, biodiversity and climate change. In this study we applied nanoelectrospray (nanoESI) ultra-high-resolution mass spectrometry (UHRMS) for the analysis of the organic fraction of PM2.5 aerosol samples collected during dry and wet seasons at a site in central Amazonia receiving background air masses, biomass burning and urban pollution. Comprehensive mass s...
Aerosol measurement methods to quantify spore emissions from fungi and cryptoga...
Löbs, Nina; Barbosa, Cybelli G.G.; Brill, Sebastian; Walter, David; Ditas, Florian; Oliveira Sá, Marta de; Araüjo, Alessandro Carioca deBioaerosols are considered to play a relevant role in atmospheric processes, but their sources, properties, and spatiotemporal distribution in the atmosphere are not yet well characterized. In the Amazon Basin, primary biological aerosol particles (PBAPs) account for a large fraction of coarse particulate matter, and fungal spores are among the most abundant PBAPs in this area as well as in other vegetated cont...
The influence that different urban development models has on PM2.5 elemental an...
Polezer, Gabriela; Oliveira, Andrea S.; Potgieter-Vermaak, Sanja; Godoi, Ana Flávia Locateli; Souza, Rodrigo Augusto Ferreira de; Yamamoto, Carlos ItsuoLimited studies have reported on in-vitro analysis of PM2.5 but as far as the authors are aware, bioaccessibility of PM2.5 in artificial lysosomal fluid (ALF) has not been linked to urban development models before. The Brazilian cities Manaus (Amazon) and Curitiba (South region) have different geographical locations, climates, and urban development strategies. Manaus drives its industrialization using the free ...
Obtenção da fase peroviskita via microemulsão
Fernandes, Leandro [UNESP]; Jafelicci Júnior, Miguel [UNESP]; Godoi, Ricardo Henrique Moreton; Zorel Junior, Henrique Emílio [UNESP]Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:49:10Z No. of bitstreams: 0; Made available in DSpace on 2013-08-22T18:49:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-01-01; Made available in DSpace on 2013-09-30T19:09:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-01-01; Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20...
Nanoparticles of La1-xSrxMnO3 compounds
Marques, Rodrigo Fernando Costa [UNESP]; Jafelicci Júnior, Miguel [UNESP]; Paiva-Santos, Carlos Oliveira [UNESP]; Jardim, Renato de FiguciredoSubmitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:20:32Z No. of bitstreams: 0; Made available in DSpace on 2014-05-27T11:20:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2002-12-01; A nanoparticles of La1-xSrxMnO3 were synthesized using homogenous coprecipitation method. The precipate was washed with water and dried at 80 °C. The samples were characterized by X-ra...